What barrel lengths did the round butt versions commonly come with? I'm interested in picking one of these up, especially an early pinned version if possible, but I prefer the round over the square butt.

Thanks.

Round butt Mod.19/66 with 2 1/2" barrels are the most common.

I think all 3in guns came with round butts , but 3in guns are very rare.

4in is probably the most common 19/66 barrel lemgth , and they were available in round butt. They're also rather rare.

4" and 6" model 19's and 66's were only available in square butt until S&W discontinued the square butt in the mid 90's.

Any round butt 4" or 6" 19's or 66's are either conversions or some special order. I believe some government agency bought a small order of round butt 4" model 19's at some point.

Also, all of the 3" model 19's or 66's I have seen were round butt. I would feel if you found a square butt 19 or 66, it likely was converted.

Naval Intelligence agents got some round-butt four-inch M-19's. I think some wound up at the FBI.

This would have been a good general option, but not one that S&W made available.

There may have been other special orders that we don't know about. Cops who wanted a gun suited for both uniform carry and for plainclothes would surely see the advantage in a round butt and four-inch bbl.

Thanks for the replies everyone. Looks like I'll be on the hunt for a 2 1/2" RB at a price I can afford.